make kestrel a tak server, so that it can send and receive pois as cots data

test/nuxt/useLiveSessions.spec.js

@@ -37,4 +37,24 @@ describe('useLiveSessions', () => {
     expect(el.exists()).toBe(true)
     expect(JSON.parse(el.attributes('data-sessions'))).toEqual([])
   })
+
+  it('startPolling and stopPolling manage interval', async () => {
+    registerEndpoint('/api/live', () => [])
+    registerEndpoint('/api/me', () => ({ id: '1', identifier: 'u', role: 'member' }), { method: 'GET' })
+    const TestComponent = defineComponent({
+      setup() {
+        const { startPolling, stopPolling } = useLiveSessions()
+        return () => h('div', {
+          onClick: () => {
+            startPolling()
+            startPolling()
+            stopPolling()
+          },
+        })
+      },
+    })
+    const wrapper = await mountSuspended(TestComponent)
+    await wrapper.trigger('click')
+    expect(wrapper.exists()).toBe(true)
+  })
 })